Humic acid is a natural, organic compound that provides plants and soil with a concentrated dose of essential nutrients, vitamins, and trace elements. Derived from Leonardite, a natural, organic compound formed over 70 million years, humic acids are among the most concentrated sources of plant nutrition. Unlike peat, which comes from a few thousand years of decomposed organic matter, Leonardite is the end product of nature's composting process, rich in vital elements for healthy soil and plants.
| Benefit | Description |
|---|---|
| Stabilises Nitrogen | Helps stabilise nitrogen, Urea, etc., reducing leaching and volatilisation. |
| Detoxifies Pollutants | Detoxifies herbicides, pesticides, heavy metals, and other soil pollutants. |
| Stronger, Healthier Plants | Increases root growth, encourages healthy root development, and boosts overall plant health. |
| Improves Soil Structure | Enhances soil structure, moisture retention, and improves nutrient accessibility for plants. |
| Feeds Beneficial Microbes | Stimulates beneficial microbial activity and reduces harmful microbes, promoting a healthy soil ecosystem. |
| Increases Crop Yield | Stimulates plant cell elongation, improves crop yield, and boosts plant immune systems. |
| Buffers Soil pH | Helps balance and buffer soil pH, creating optimal conditions for plant growth. |
STAINING WARNING: Staining may occur during application.
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| Application Type | Rate |
|---|---|
| Lawn & Turf: | 2.0-5.0kg/100sqm (200-500kg/Ha) |
| Plants & Garden: | 2.0-5.0kg/100sqm (Handful/pot) |
| Potting Mix: | Add at 2.5-10% (0.5 - 2.0kg/25 litres or 20-80kg/m³) |
| Vegetables: | 1.25-3.75kg/100sqm (125-375kg/Ha) |
| Fruit: | 3.75-5.0kg/100sqm (375-500kg/Ha) |
| Cereals: | 2.0-3.75kg/100sqm (200-375kg/Ha) |
| Broadacre: | 2.0-5.0kg/100sqm (200-500kg/Ha) |
| APPLY EVERY 3 MONTHS | |
Humic acid granules are a concentrated organic soil conditioner derived from natural leonardite. They improve soil structure, increase nutrient retention, and stimulate microbial activity.
Humate enhances nutrient availability, boosts root growth, improves soil aeration, and increases water-holding capacity. It's ideal for improving sandy, clay, or compacted soils.
Yes. Our Humic Acid Granules are certified organic and safe for use in all gardens, including organic food production, native landscapes, and eco-conscious lawn care.
All soil types can benefit, but it's especially useful in sandy soils (to hold nutrients and water) and clay soils (to improve structure and drainage).
Yes. These granules are safe for all plants, including lawns, veggie patches, fruit trees, natives, and ornamentals. They improve overall plant health without burning roots.
Humic acid can be applied regularly throughout the year as part of your soil conditioning program. Refer to our Product Usage Guide for seasonal advice.
Yes. Humic acid enhances the efficiency of other fertilisers by helping them stay in the root zone longer and making nutrients more available to plants.
Absolutely. Humate granules are excellent for rebuilding soil organic matter and long-term soil fertility. They support microbial activity and healthier plant growth.
You can spread them by hand or with a broadcast spreader and water them in well. They are suitable for lawns, garden beds, tree plantings, and even native areas.
No, humic acid is not a fertiliser in the traditional sense. It doesn’t supply NPK nutrients directly but improves how plants access and absorb nutrients already present in the soil or from added fertilisers.
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First time owning lawn. Gave the team at plant doctor a ring and they supplied me with a wealth of information. Products turned up quickly.
Will definitely be getting more 8 weeks difference been using stimulizer, activ8mate, soil wetter, seaweed secrets and champion fertiliser. Was super fast delivery.
Only have great things to say about Plant Doctor. Organic products and a competitive price, fast shipping and easy to contact with questions. Have had great results with the special mix for lawns, and my plants (indoor and outdoor) love the seaweed secrets. I am excited to test out some of the animal products soon!
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